Message:

<p>[QUOTE=&quot;gatzdon, post: 207577, member: 8247&quot;]<b>Possible explaination for the missing inscription Washington Dollars</b></p><p><br /></p><p>OK, </p><p><br /></p><p>Sorry for starting a new thread about this, but I am anxious to run my theory before a crowd.</p><p><br /></p><p>In reviewing this thread, <a href="http://www.cointalk.org/showthread.php?t=22242" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.cointalk.org/showthread.php?t=22242" rel="nofollow">http://www.cointalk.org/showthread.php?t=22242</a>, you will see some </p><p>pictures that the OP (n_sandler4) uploaded showing his coin with a &quot;starburst&quot; shaped pattern</p><p>on the coin.</p><p><br /></p><p>I had twelve of these with the same pattern.&nbsp; I did not find a single one with the same pattern and a proper inscription, </p><p>but admittedly my theory allows for it.&nbsp; As all the coins I&#039;ve looked at do not have any part that</p><p>matches identically, I&#039;m arguing that it is not a problem associated with the stamping process.&nbsp; </p><p>I have a coin with the same die clash marks as the one pictured in the link above.&nbsp; The pattern </p><p>on mine is similar but does not match up with the one pictured.&nbsp; If the effect was die related, </p><p>you would see an increasing or diminishing pattern.&nbsp; As my coin has the effect in some spots not </p><p>seen in the pictured coin, and the pictured coin has the effect in some spots not seen in my coin, </p><p>I believe that it is improbable that it is related to the stamping process.</p><p><br /></p><p>I&#039;ve read a few articles now about how the edge is incused.&nbsp; It appears that the coins are rolled</p><p>between two large discs (similar to a ball going through a pitching machine).&nbsp; It would appear</p><p>that both discs would need to be going at the correct speed with respect to each other in order to </p><p>rotate the coin as it is incused.&nbsp; This is done at an extremely high speed to maintain the </p><p>advertised production rates.</p><p><br /></p><p>If a coin were to have a drop of something on it and it were to be spun at a high speed, the drop</p><p>would radiate out in a pattern similar to what is shown in the pictures uploaded.&nbsp; A lubricant or </p><p>hydraulic fluid could be staining the coin or even dissolving the anitoxidant coating on the coin.</p><p>If the antioxidant coating is added after the edge inscription step, any grease on the coin</p><p>could be preventing proper application of the antioxidant and enhance the effect.</p><p><br /></p><p>Now, if the machine was hydraulic or had a recirculating lubricant, a leak could eventually lead to </p><p>a failure of the equipment.&nbsp; If one of the rotating discs was slightly off in speed, an operator </p><p>may not visually notice anything is amiss.&nbsp; Unfortunately, the speeds would need to be precise to </p><p>properly rotate the coin as it goes through to give it a proper inscription.&nbsp; So, if the speed was </p><p>slightly off and the coins were not being rotated correctly, you would be forcing coins through, but </p><p>instead of being incused, they are being scraped.&nbsp; You will notice that many of the philly coins</p><p>have a sanded look to them, hence the initial guess that this error was forged rather than authentic.</p><p><br /></p><p>If the reason for the incorrect speed of one of the rotating discs was a hydraulic leak or improper</p><p>lubrication, that could explain the appearance of some of these coins and why we are only seeing</p><p>it on ones missing the edge inscription.&nbsp; This theory could of course permit some coins with </p><p>normal inscriptions.</p><p><br /></p><p>So, I open up to feedback on this theory and hopefully those with better insight into the specifics</p><p>of the equipment used to incuse the inscriptions can either refine it, or refute it.</p><p><br /></p><p>Don</p><p><br /></p><p><span style="color: red">This thread has been merged with the prior one where you first stated this theory.&nbsp; One topic = one thread.&nbsp; </span>[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in